我必须使用HttpClient类向具有JSON内容的REST API服务发送删除命令,并且无法使其正常工作.
API调用:
DELETE /xxx/current
{
"authentication_token": ""
}
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因为我无法在下面的语句中添加任何内容:
HttpResponseMessage response = client.DeleteAsync(requestUri).Result;
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我知道如何使用RestSharp来完成这项工作:
var request = new RestRequest {
Resource = "/xxx/current",
Method = Method.DELETE,
RequestFormat = DataFormat.Json
};
var jsonPayload = JsonConvert.SerializeObject(cancelDto, Formatting.Indented);
request.Parameters.Clear();
request.AddHeader("Content-type", "application/json");
request.AddHeader ("Accept", "application/json");
request.AddParameter ("application/json", jsonPayload, ParameterType.RequestBody);
var response = await client.ExecuteTaskAsync (request);
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但我没有RestSharp就完成了.
嗨,当我遇到这样的情况时,我对sequenceEqual有一些问题:
Sentence s1 = new Sentence { Text = "Hi", Order = 1 };
Sentence s2 = new Sentence { Text = "Hello", Order = 2 };
List<Sentence> list1 = new List<Sentence> { s1, s2 };
List<Sentence> list2 = new List<Sentence> { s1, s2 };
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这很好用
bool equal = list1.SequenceEqual(list2);
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并返回true;
但是当我有一些方法返回时List<Sentence>
,例如:
public List<Sentence> Getall()
{
Sentence s1 = new Sentence { Text = "Hi", Order = 1 };
Sentence s2 = new Sentence …Run Code Online (Sandbox Code Playgroud) 在对 REST API 的简单 POST 请求中,我将对象序列化为 JSON,如下所示:
var userDto = new { user = new { login = Username, password = Password } };
var jsonPayload = JsonConvert.SerializeObject(userDto, Formatting.Indented);
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在调试模式下一切正常,但在发布模式下jsonPayload变量为空,并且在我的 try/catch 中我得到NullReferenceException. 为什么这个变量的值在调试/发布中不同以及如何解决这个问题?
这是 Android 应用程序,我已启用互联网权限。
在我成功登录后的应用程序中,我想使用标签注册到 NotificationHub,其中 Tag 是电子邮件地址。
以下场景在 iOS 上运行良好:
MessagingCenter.Subscribe<LoginViewModel, string>(this, MessagesId.RegisterForPush, (s, arg) =>
{
NSSet tags = new NSSet(arg); // create tags if you want
Hub.RegisterNativeAsync(deviceToken, tags, (errorCallback) =>
{
if (errorCallback != null)
Console.WriteLine("RegisterNativeAsync error: " + errorCallback.ToString());
});
});
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但相当于 Android 抛出一个NetworkOnMainThreadException:
MessagingCenter.Subscribe<LoginViewModel, string>(this, MessagesId.RegisterForPush, (s, arg) =>
{
var tags = new List<string>() { arg };
try
{
var hubRegistration = Hub.Register(registrationId, tags.ToArray());
}
catch (Exception ex)
{
Log.Error(PushHandlerBroadcastReceiver.TAG, ex.Message);
}
});
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你知道如何解决这个问题吗?
我有五个int变量:
int firstSequence;
int secondSequence;
int thirdSequence;
int fourthSequence;
int fifthSequence;
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这些变量中的每一个都可以具有1-5的值.如果每个变量都具有唯一值,如何以最有效的方式检查?我的意思是只有一个可以有值= 1等.
private bool IsOrderCorrect()
{
if(firstSequence != secondSequence && ...)
}
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